• Skip to main content
  • Skip to search
  • Skip to footer
Cadence Home
  • This search text may be transcribed, used, stored, or accessed by our third-party service providers per our Cookie Policy and Privacy Policy.

  1. Community Forums
  2. Allegro X PCB Editor
  3. Automatically Create Differential Pairs Based on Polarity...

Stats

  • Replies 0
  • Subscribers 158
  • Views 35
  • Members are here 0
More Content

Automatically Create Differential Pairs Based on Polarity Indicators in Net Names

vidhyaparameswari
vidhyaparameswari 4 hours ago

Are you tired of manually creating differential pairs for your PCB design? Look no further!

 Starting from SPB 25.1, you automatically create differential pairs based on the polarity indicators in the net names using a centralized common dialog box.

 Method 1: Using the Menu Bar

  1. Go to Logic > Assign Differential Pair in the menu bar.
  2. This will open the Differential Pair Automatic Setup form.
  3. Enable the check boxes against each Diff Pair Polarity Indicators to select the nets with the respective polarity indicators.
  4. If you have custom polarity indicators, enter them against the Positive and Negative fields under the User Defined Polarity Indicators section. 

  5. Add a prefix to the Diff Pair Name if desired. Click the Create Diff Pairs button to automatically create the differential pairs.

Alternative Method: Using the Constraint Manager

  1. Right-click in the Constraint Manager.
  2. Go to Create > Differential Pair > Auto Setup.
  3. Follow the same steps as above to automatically create the differential pairs.

Tips and Variations:

 The automatically created differential pairs will be logged in the cmtemp.log file. You can customize the polarity indicators and prefix to suit your specific design requirements.

 By following these simple steps, you can save time and effort in creating differential pairs for your PCB design. Try it out and let us know if you have any questions or need further clarification!

  • Cancel
  • Sign in to reply
Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.

© 2025 Cadence Design Systems, Inc. All Rights Reserved.

  • Terms of Use
  • Privacy
  • Cookie Policy
  • US Trademarks
  • Do Not Sell or Share My Personal Information